F1 Construction – Soil Reuse & Stabilisation for Section 278 Compliance
Permenant works – Highways
Client: F1 Construction
Sector: Infrastructure / Highway Works
Challenge:
Maximizing the reuse of existing site soils to achieve a zero cut/fill balance while meeting Local Highways Authority requirements for stabilised materials as a replacement for traditional capping layers in Section 278 works.
FI Construction faced a dual challenge on a major infrastructure project: reduce environmental impact by eliminating the need for imported fill and ensure full compliance with stringent highway specifications for sub-base construction. The goal was to stabilise in-situ soils to serve as a structural capping layer, avoiding both waste and additional material costs.
Solution:
Our team initiated a comprehensive soil assessment program to evaluate the suitability of existing materials for stabilisation. Through laboratory testing and field trials, we developed a series of bespoke powder blends tailored to the site’s geotechnical profile. Each blend was engineered to enhance strength, reduce moisture sensitivity, and meet the mechanical performance criteria set by the Local Highways Authority.
A detailed quality plan was implemented to govern the stabilisation process, including:
- Material sampling and classification
- Blend optimisation and performance testing
- On-site verification and compliance monitoring
The stabilised soils were rigorously tested for parameters such as California Bearing Ratio (CBR), compaction, and durability under traffic loading.
Outcome:
The project achieved a zero cut/fill balance, significantly reducing environmental impact and material transport costs. The stabilised soil layers met all required specifications for use as capping under Section 278, and the build was fully compliant with local authority standards.
FI Construction praised the technical precision and sustainability of the solution, which delivered both economic and environmental benefits. The success of this approach demonstrates the value of bespoke soil stabilisation in modern highway construction.